linux-ext4 - Re: [PATCH v2] ext4: bio_alloc with __GFP_DIRECT

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Date:   Fri, 15 Nov 2019 11:24:16 +0800
From:   Gao Xiang <gaoxiang25@...wei.com>
To:     "Theodore Y. Ts'o" <tytso@....edu>
CC:     Chao Yu <yuchao0@...wei.com>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        <linux-ext4@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Ritesh Harjani <riteshh@...ux.ibm.com>
Subject: Re: [PATCH v2] ext4: bio_alloc with __GFP_DIRECT_RECLAIM never fails

Hi Ted,

On Thu, Nov 14, 2019 at 10:19:53PM -0500, Theodore Y. Ts'o wrote:
> On Thu, Oct 31, 2019 at 05:29:58PM +0800, Chao Yu wrote:
> > On 2019/10/31 17:23, Gao Xiang wrote:
> > > Similar to [1] [2], bio_alloc with __GFP_DIRECT_RECLAIM flags
> > > guarantees bio allocation under some given restrictions, as
> > > stated in block/bio.c and fs/direct-io.c So here it's ok to
> > > not check for NULL value from bio_alloc().
> > > 
> > > [1] https://lore.kernel.org/r/20191030035518.65477-1-gaoxiang25@huawei.com
> > > [2] https://lore.kernel.org/r/20190830162812.GA10694@infradead.org
> > > Cc: Theodore Ts'o <tytso@....edu>
> > > Cc: Andreas Dilger <adilger.kernel@...ger.ca>
> > > Cc: Ritesh Harjani <riteshh@...ux.ibm.com>
> > > Cc: Chao Yu <yuchao0@...wei.com>
> > > Signed-off-by: Gao Xiang <gaoxiang25@...wei.com>
> > 
> > Reviewed-by: Chao Yu <yuchao0@...wei.com>
> 
> Thanks, applied.
> 
> 					- Ted

Thanks for considering this. Have a nice day.

Thanks,
Gao Xiang